E.D. Tex. P. R. 3-4 — Document Production Accompanying Invalidity Contentions

High confidence· verified September 26, 2026Local Rules

Summary

E.D. Tex. P. R. 3-4 — Document Production Accompanying Invalidity Contentions: the court's own rule, verbatim from UNITED STATES DISTRICT COURT FOR THE EASTERN DISTRICT OF TEXAS LOCAL RULES (as of February 9, 2026), official PDF, sha-custodied. Court-level requirement: applies in every case before the U.S. District Court for the Eastern District of Texas alongside the federal rules and any judge-specific procedures.

Requirement

With the “Invalidity Contentions,” the party opposing a claim of patent infringement must produce or make available for inspection and copying: (a) Source code, specifications, schematics, flow charts, artwork, formulas, or other documentation sufficient to show the operation of any aspects or elements of an Accused Instrumentality identified by the patent claimant in its P. R. 3-1(c) chart; and (b) A copy of each item of prior art identified pursuant to P. R. 3-3(a) which does not appear in the file history of the patent(s) at issue. To the extent any such item is not in English, an English translation of the portion(s) relied upon must be produced.

Source of truth

With the “Invalidity Contentions,” the party opposing a claim of patent infringement must produce or make available for inspection and copying: (a) Source code, specifications, schematics, flow charts, artwork, formulas, or other documentation sufficient to show the operation of

Official source: E.D. Tex. — Rules & Orders (U.S. District Court, Eastern District of Texas)
Source health: Healthy · checked October 4, 2026
Effective date: February 9, 2026
Last verified: September 26, 2026benchpath-appfed-rules-2026-09-25

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